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EXD.6:3 - Forces
| Force | Practical tension |
| A possible improvement and its burden | Additional structure or support may help the use while increasing authoring, reading or maintenance cost. |
| Comparable conditions and realistic use | Isolating a change aids attribution; actual explanations may need coordinated content, expression and help changes. |
| Immediate evidence and later outcomes | One response can show a current inference without establishing later independent use. |
| Decisive checking and unnecessary measurement | Some differences need observation; others can be settled by a missing claim, wrong answer or sufficient incumbent. |